Two subtitle files for one video — two languages for a bilingual household, or two halves of a film split across parts — and you need them as one track. This free subtitle merger combines them into a single file, matched by timing so both languages appear together, or joined end to end for multi-part videos. Everything runs in your browser, so nothing is uploaded and no signup is needed.
How to use this subtitle merger
Three quick steps — no signup, no cost.
Choose two.srt or.vtt files, in any mix, and put them in the order you want.
Choose Overlay for two languages on screen together, or Sequential to join part one and part two end to end.
Save the single combined file and load it in your player. Keep your originals as backup. That is all.
Why this subtitle merger matches by time, not by number
Files from different sources rarely share cue numbers — timing is what lines them up.
Overlay mode pairs each second-language line with the first-language line it overlaps most, so both appear and disappear together.
Sequential mode shifts the second file’s timestamps to continue after the first file ends, instead of stacking two timelines on top of each other.
A line with no partner is not thrown away — it stays in the merged file at its own time.
Your subtitle files never leave your device, because the merge runs entirely in your browser.
Subtitle Merger FAQs
Short, direct answers to the questions readers ask most.
Overlay for two languages over the same video — both languages on screen together. Sequential for two parts of one video — part two’s timestamps shift to continue after part one ends.
Yes. Files can be mixed, and the output takes the format of the first file you uploaded.
Then the merge will look wrong even though it worked: subtitles timed for a Blu-ray release rarely match a web release. Use files from the same video source, and re-sync first if they differ.
No — not automatically. Once merged, the two tracks become one file, so always keep your original files as backups.
Two at a time. To combine three or more, merge two, download the result, and merge that result with the next file.
Yes. It runs entirely in your browser — no account, no signup, and nothing uploaded.
Related Tools
More free converters that work the same way — right in your browser.
Free srt to vtt converter that turns SubRip subtitles into WebVTT, with no upload and no signup.
VTT to SRT ConverterFree vtt to srt converter that turns WebVTT subtitles back into SubRip, with no upload and no signup.
Audio JoinerFree audio joiner that combines tracks into one file, with no upload and no signup.
Video TrimmerFree video trimmer that cuts a clip to the part you need, with no upload and no signup.
Try the related tools above, or go back to the Convertion homepage for more free converters.
